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Mainz 2014 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 39: Halbleiter 2

T 39.7: Vortrag

Montag, 24. März 2014, 18:15–18:30, P109a

Surface effects in Segmented Germanium Detectors — •Lucia Garbini for the GeDet collaboration — Max-Planck-Institut für Physik, München

Germanium detectors are widely used to explore neutrino-less double beta (0 ν β β) decay. One of the most important aspects while looking for rare events, as 0 ν β β decay, is to try to have every source of background under control. In underground laboratories, the effects from cosmic radiation and natural radioactivity are reduced. Surface contamination occurring during detector production can be a problem. Typical examples are 210Pb, coming from 222Rn, and 226Ra, from the 238U chain. It’s therefore really important to characterize the response of Germanium detectors to alpha particles in order to classify such events as background events. In this talk, results obtained with a cylindrical true coaxial n-type segmented germanium detector, using the GALATEA test facility, are presented. A passivated end-plate of the detector was scanned with a collimated 241Am source.

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